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. 1986 Apr;80(4):1038–1040. doi: 10.1104/pp.80.4.1038

Photosynthetic Adaptation by Synechococcus leopoliensis in Response to Exogenous Dissolved Inorganic Carbon 1

William P Mayo 1, Timothy G Williams 1, Douglas G Birch 1, David H Turpin 1
PMCID: PMC1075252  PMID: 16664715

Abstract

Synechococcus leopoliensis was grown over a wide range of dissolved inorganic carbon (DIC) concentrations (4-25,000 micromolar) which were obtained by varying culture pH (6.2-9.6) and the CO2 concentration of the gas stream (36-50,000 microliters per liter). The [DIC] required to half-saturate photosynthesis (K½DIC) was found to vary depending upon the ambient DIC concentration at which the cells were grown. Low [DIC] grown cells exhibited low values of K½DIC (4.7 micromolar) whereas cells grown at high [DIC] exhibited high values of K½DIC (1-2.5 millimolar). Intermediate concentrations of DIC produced intermediate values. Changes in K½DIC appeared to be solely a function of [DIC] and were independent of both culture pH and CO2 concentration. As changes in K½DIC occur in response to DIC concentrations commonly found in natural systems we suggest this adaptation may be of ecological significance.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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